code: def test_single_sentence(summarizer):
      s = Sentence(
          "I am one slightly longer sentence.", Tokenizer("english")
      )
      document = build_document([s])
  
      returned = summarizer(document, 10)
  
      assert len(returned) == 1
  
file_path: sumy/tests/test_summarizers/test_kl.py
imports: from __future__ import absolute_import
  from __future__ import division, print_function, unicode_literals
  import pytest
  from sumy.models.dom._sentence import Sentence
  from sumy.nlp.tokenizers import Tokenizer
  from sumy.summarizers.kl import KLSummarizer
  from ..utils import build_document
label_desc: Use image node_id 5 for calling a global function with example usage: test_single_sentence(summarizer) without return types